Combined sheet and pair furnace.



(Application filed May 18, 1898.)

3 Sheets$heet I.

(No Model.)

WITNESSES 2 ,1; ATTORNEY.

NoQ 633,372. Patented Sept. I9, I899. W. SUMMERS.

COMBINED SHEET AN D PAIR FURNACE.

(Application filed. May 18, 1898.)

(No Model.) 3 Sheets-Sheet 2.

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No. 633,372. Patented Sept. l9,'l899. W. SUMMERS.

COMBINED SHEET AND PAIR FURNACE.

(Application filed May 18, 1898.)

3 Sheets Sheet 3 (No Model.)

INVENTOR:

BY ATTORNEY.

MM: %/7W UNITED STATES. PATENT OFFICE.

XVILLIAM SUMMERS, OF PIQUA, OHIO.

COMBINED SHEET AND PAIR FURNACE.

SPECIFICATION forming part of Letters Patent N 0. 633,372, dated September 19, 1899.

Application filed May 18, 1898. Serial No. 681,088. (No model.) v

To all whont it incty concern:

Be it known that 1, WILLIAM SUMMERS, a citizen of the United States, residing at Piqua, in the county of Miami and State of Ohio, have invented certain new and useful Improvements in a Combined Sheet and Pair Furnace; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference beinghad to the accompanying drawings, ahd to the letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in a combined sheet and pair furnace particularly adapted to be used in rolling-mills in manufacturing sheet-iron, sheet-steel, fire-bed, black-plate for tinning, (to. and it consists in certain new, useful, and improved features of construction and novel combination and arrangement of parts, as will be more fully described hereinafter and pointed out in the subjoined claims in accordance with the statutes in such cases made and provided.

The principal objects of this invention are to provide for more thoroughly and evenly baking the metal plates withouttheir scaling or chipping and withless hardship to the operator, to provide for a more even and regular distribution of the heat and means for more readily and quickly carrying off all waste products of combustion and superfluous amount of heat, for obtaining the greatest amount of heat with the least expenditure of fuel, and in so constructing the said furnace of so few parts as to be readily and cheaply manufactured.

In carrying out these objects and having reference to the improved features of construction my invention consists in constructing the chamber of the sheet fu-rnace with inclined side walls and providing in the floor below its bottom surface in said chamber at its front, in close proximity to the door, with a continuous retaining-canal or hot-air duct and in constructing the furnace with two stacks, each having two flues, one at each side of the furnace-walls, communicating thereinto, and other features, which will bemore fully described in detail hereinafter.

Referring to the accompanying drawings,

illustrating my invention and in which similar letters of reference indicate like parts throughout the several views, Figure 1 is a side elevation of my improved furnace. Fig. 2 is a plan view of same. Fig. 8 is a transverse longitudinal section taken on line 1 1, Fig. 1. Fig. 4 is avertical longitudinal section'taken on line 2 2, Fig. 2. Fig. 5 is a vertical transverse section taken on the line 3 3, Fig. 2, so as to show the reclining walls. Fig. 6 is a vertical transverse section taken on the line 4 4;, Fig. 2, so as to show the forward or sheet chamber stack and the side fines communicating thereinto. Fig. 7 is a vertical transverse section taken on the line 5 5, Fig. 2, so as to show the rear or pair chamber stack, the side flues communicating thereinto and having the side walls of said rear or pair chamber broken at the bottom to show the transversely-inclined floor and one of the cinder-openings; and Fig. 8 is a detail view taken on line 6 6, Fig. 1, so as to show the continuous retaining-canal or hot-air duct in floor of sheet-chamber at its front.

Referring in detail to my invention by means of the aforesaid letters of reference as employed in the several views of the drawings, a indicates the fireplace orv chamber, which is separated from the pair-heating chamber orfurnace b byabridge-wall c, said bridge-wall being of sufficient height and extending to within a sufficient distance from the roof or crown of the furnace so as to allow of the free passage or course of the flames, heated air, and products of combustion to sweep over and down onto the pairs of metal bars in the pair-heating chamber (thus thoroughly baking or heating the said pairs) and thencedividing into two channels or streams, a portion of which passes into the opening d in each of the two side flues e, which are formed in the side walls of the paircham-ber when built, and as the said flues unite at the top and terminate in the smokestack f of the pair-chamber it is carried up and off in smoke through the said smokestac'k by reason of the draft or suction thus created. (See Fig. 7 and the arrows in Fig. 4.)

g indicates the fuel-opening or fire-hole formed in one side of the fireplace (0.

I provide the side wall on one side of the pair chamber or furnace with an opening h for the introduction of the pairs of metal bars to be heated, while in the opposite side wall of the said pair-chamber I provide a sufficient number of cinder-openings i, which by reason of the longitudinal and transverse inclination of the floor toward the cinder-openings, as shown in Fig. 7, affords a ready outlet-passage for the einders or slag, thus helping to prevent their objectionable accumulation.

The flames, heated air, and products of combustion which are constantly pouring over the bridge-wall c from the fire-chamber a,where they are generated, are in such quantitles that after a small portion is carried off through the opening (l in the side fines e and thence up through smoke-stack f, as just above referred to, the balance or larger portion is forced or crowded toward the front of the sheet or reheating chamber or furnace 7c and by reason of the suction created by the draft from the opening Z of the two side fines m is carried up over the arched bridge 17. and thence down through the said sheet or reheating chamber orfurnace 7c and over the plates or sheets of metal therein, which are introduced through the opening 0 in the front or forward portion of the said sheetcham'ber. Said stream of flame, hot air, and products of combustion then divides into two parts or portions, one of which passes into the opening Z, a portion of this latter part passing up the two side flues m, (which are formed in the side walls when built, the same as the fines e in the pair-chamber,) and as the said fines terminate in the smoke-stack p of the sheet-chamber this portion of flame and heat is also carried up and off in smoke, while a balance of this hot air is carried down and constantly retained in the hot-air ducts or retaining-canal q, located in the floor just a short distance below its top surface and in close proximity to the door at the front of said chamber, by which means the floor is always kept evenly warm and the cooling ofi of the front part of the chamber by reason of the constant opening of the door which covers opening 0 is remedied, and the sheets and plates of metal instead of being cooked or baked at their rear end only, as has been the case heretofore when what are termed heating-fines, opentopped fines, and longitudinal fines were employed, as these fiues or ducts, running from the front to the rear of said sheet or reheating furnace, while they serve to counteract the cooling off of front edges of the metal sheets and plates by reason of the door being constantly opened, the heat of the rear of said chamber is also proportionately increased, so that the said metal plates and sheets are even more unevenly baked than when these fines are not employed; but it will be readily observed and understood that by means of my retaining canal or duct located only where the most heat is needed these plates and sheets are thus baked evenly throughout their entire length, (see Figs. 6 and 8 and the arrows in Fig. 4,) while the remainder or other portions of the flames, heated air, and products of combustion are carried around to the back or rear of the sheet-chamber, where they circulate and are retained in said chamber by the arched or hooded bridge at. (See Fig. 4.) At the rear of the sheet-chamber 7s and at a point where it communicates and connects with pair-chamber I) its two inclined side walls 1' are formed in a concave curve 8 for the purpose of shooting or forcing the flames and hot air as they come from the pairchamber to follow and cling closely to the side walls, and thus spread over and around the sheets and plates which rest on their edges against said inclined side Walls 1'. It will be here observed that avery important feature of my invention is in building the side walls 9' of the sheet-chamber at a slight angle from the perpendicular or what may be termed inclined walls for the purpose of preventing the sheets or plates from constantly falling down and causing the heater or operator the hardship of replacing them in an upright position on their edges against the walls again; also, by inclining the side walls the heat does not as readily cause the top edges tocurl out of shape and cling together as heretofore. I provide the two side walls 0' at a point just over arched bridge at with a cold-air opening or duct t and also at the base of said bridge 71 with a cold-air duct it, both of said ducts being employed for the purpose of introduc ing cold air into the sheet-chamber when necessary, while the lower duct to may also be used for the removal of all waste material, such as ashes, refuse, &c. The opening oin front of sheet-furnace and the opening it in pair-chamber are provided with doors of any suitable style, although I prefer doors which slide and are operated from the top by a weight and lever. Both smoke-stacks are of the ordinary and well-known form of construc tion and provided on top with the usual form of damper. The furnace-walls are built of brick with the metal casing in the usual manner.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a furnace for heating metal, the combination with the pair-chamber, of a sheet-- chamber having direct communication with the pair-chamber, a door at the rear end of the sheet-chamber, said sheet-chamber being provided with a hot-air-retaining duct in its floor near the door, draft openings or ports, and outwardly-inclined side walls 0', said draft openings or ports being located at the lower portion of said walls 0*, and near the door end of the sheet-chamber and communicating with said duct, whereby said duct is placed in direct communication with the sheet-chamber, and side flues communicating with said draftopenings and united at their upper ends to form a smoke-stack.

2. The combinationinafurnace withapairchamber having a direct communication or openinginto the sheet-chamber, and provided with cinder-openings or cinder-outlet passages; of side fiues having draft openings or ports leading from said pair-chamber and terminating in a smoke-stack; a sheet or reheating chamber having its floor at its front end in close proximityto the opening and door through which the sheets and plates are admitted; and provided with a hot-air-retaining canal or duct, communicating with a draft opening or port whereby said canal or duct is placed in direct communication'with the reheating-chamber; side flues communicating with said sheet-chamber; said side flues uniting and terminating at theirtops in a smokestack; the wallsof the sheet or reheating chamber inclining outwardly at a slight angle from the perpendicular from the floor to the top of said chamber, and so curved at their ends as to cause the flames to shoot around the sheets and plates; the covered or arched bridge-wall located at the rear of the sheet or reheating-chamber and the air-ducts one of which can also be utilized for the removal of all waste particles or refuse matter, substantially as specified.

3. In a furnace, the combination with the sheet-chamber and fire-chamber of a pairchamber communicating with the sheet-chamber, and provided with cinder or slag openings or outlet-passages in one of its side walls; a

floor having a longitudinal inclination or slope from the fire-chamber to the sheet or reheating chamber, and a transverse inclination or slope toward said cinder or slag openings; of side fines having draft openings or ports leading into said pairchamber and terminating in a smoke-stack; a sheet or reheating chamber having its fioor at its front end provided with a hot-air-retaining canal or duct communicating with a draft opening or port Whereby said canal or duct is placed in direct com munication with the reheating-chamber; side flues communicating with said sheet-chamber, said side flues uniting and terminatingat their tops in a smoke-stack, the walls of the sheet or reheating chamber inclining outwardly at a slight angle from the perpendicular, from the floor to the top of said chamber, and so curved at their ends as to cause the flames to shoot around the sheets and plates; the covered or arched bridge-wall located at the rear of the sheet or reheating chamber and the airducts one of which can also be utilized for the removal of all waste particles or-refuse matter, substantially as specified.

In testimony whereof I affiX my signature in presence of two witnesses.

WILLIAM SUMMERS. Witnesses:

WM. H. GILBERT, LEONARD H. SHIPMAN. 

